The worst part of having a cell phone is remembering to recharge it. But what if it could be recharged by simply keeping it in your pocket?

That's the theory behind a new phone concept, which features a shell made of copper. The copper can draw energy from sources of heat--including your very own body heat--allowing it to be recharged without ever actually being plugged in. The design was created by Patrick Hyland from the UK, though whether or not it will actually ever be put into production by the likes of Blackberry or Apple remains to be seen.